Daily Sunspot Evaluation
Observation Sheet Tuesday, 30 September 1997
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 2
- Number of spots (f)
- 5
- Relative number (R)
- 25
- Observer
- HE
- Reading
- all checks consistent
- File
- 19970930.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 4 | -31 | 61W | 127 | 64W | 8 | 26 |
| 2 | ? – 1 | -28 | 75E | 351 | 72E | - | 28 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.